Hello Szalam, I have a same issue, I upgraded yesterday from AE CC 13.1 to 13.2. Rendering Error. "Initializing Background Processes" and after that, it does not move already.
My computer specs is OSX Yosemite iMac 27 inch 3.6GHz Intel i7 32GB NVIDIA GeForce GTX 780M 4096MB
This seems like a very different issue considering that the error message is entirely different.
As I said in the other thread, we will need a lot more information.
What are you doing that leads up to this error message? Does this happen in all comps in all projects?
And all the info mentioned here: http://forums.adobe.com/thread/961743